5. What is the name of the famous narrow passageway between mountains that pioneers took on their way west?
a. Piedmont Plateau
c. Cumberland Gap
b. Atlantic Coastal Plain
d. Mammoth Cave

could you use this to with a topic?

the key difference between a democracy and a republic lies in the limits placed on government by the law, which has implications for minority rights. both forms of government tend to use a representational system — i.e., citizens vote to elect politicians to represent their interests and form the government.

c, they united with once